Data Acquisition and Performance Evaluation of NVH Characteristics of Electric Power Steering System
To solve the problem that NVH characteristics data of automotive electric power steering system had a large multi-point asynchronous sampling error and the performance evaluation basis was single,a 24-channel synchronous data acquisition of NVH characteristics and multi-aspect characteristic analysis system was designed.By means of connecting multiple data acquisition modules,reading and writing by synchronous dynamic random-access memory,and fusing peripheral component interconnect express,the synchronous,accurate acquisition and fast transmission of 24-channel NVH characteristics data were realized.The NVH characteristics of electric power steering system were analyzed and evaluated from the aspects of mechanical property and noise and vibration characteristics.The results show that compared with the traditional test methods,the proposed method can realize multi-point synchronous high-precision sampling and multi-aspect signal time-frequency domain analysis,and the data acquisition rate of each channel can reach 200 kHz/s,and the time-frequency domain analysis basis is richer and more comprehensive.
electric power steering systemNVH(noise-vibration-harshness)characteristicsdata acquisitionperformance evaluation
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